let mat be a matrix of integers in r. write a function to find how many...

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let mat be a matrix of integers in r. write a function to find how many...

let mat be a matrix of integers in r. write a function to find how many rows have exactly two instances of the number 7

math Statistics-And-Probability

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Answer 1

Answer #1

seven=0
count=0
for(i in 1:nrow(mat)){
for(j in 1:ncol(mat)){
if(mat[i,j]==7){count=count+1}}
if(count==2){seven=seven+1
count=0}}
seven

seven gives the no of instances of exactly two 7 in a row.

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Answer 2

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